Is a 307 engine built on a 350 block

Question

I'm trying to figure out how to get more power out of my 307 or if it is on a 350 block should i build it into a 350 and if so would all do i need to do so

Answer 1

If it is an olds 307, it is different than a chevy 350, i got more power into my 307, buy bolting on a holley 600 cfm carb, an accel super coil, with 8.8 mm wires, a free flowing exhaust, like a flowmaster, with a high flow cat, toped off with a huge k&n breather... That was in a 1987 cutlass rwd... all bolt on stuff and the olds 307 can handle it no problem... i had to take the dash apart and remove the engine light bulb...

Answer 2

They're both small block Chevy's, but with different bore and stroke. It can be done if you want to urn it into a 350, but it's a whole lot of machining and labour plus a different crankshaft. Cheaper to just find a good 350.